Walter t



Patnted sept. 19, 1893.

(No Model.) l

W. T. KOSINSKI. ARMATURE FOR DYNAMO ELEGTRIG'MAGHINES 0R MOTORS.

y No. 505,247.

WITNESSES UNITED STATES PATENT OFFICE.

WALTER T. KOSINSKI, OF NEV YORK, N. Y.

ARMATU RE FO R DYNAMO-ELECTRIC MACH IN ES OR MOTORS.

SPECIFICATION forming part of Letters Patent No. 505,247, datedSeptember 19, 1893.

Application filed May 5. 1893. Serial No. 473104. (No model.)

To @ZZ whom t may concern:

Be it known that I, WALTER T. KosiNsKI, a citizen of the United States,residing at New York, in the county of New York and State of NewYork,have invented certain new and useful Improvements in Armatures forDynamo-Electric Machines or Motors, of which Ehe following is a full,clear, and exact descripion.

My invention relates to armatures for dy name electric machines ormotors, the ob- Ject being to provide a construction which Shall becheap to manufacture, in which the coils may be formed complete beforetheir application to the armature, and in which any individual coil maybe removed for repairs without disturbing the others.

To this end, my invention consists of an armature consisting of aplurality ot' separate laminated cores to which the coils are appliedbefore the armature is entirely assembled. The means for attaching thesecores to the armature or for assembling the parts of the armature alsoconstitutes a feature of my invention.

The invention will be described in detail with reference to theaccompanying drawings, in which- Figure l represents an end elevation ofthe armature, one of the coils being removed to show the form of itscore; and Fig.2 is a section of a portion of the armature, indicated bythe line x of Fig. 1. Fig. 3 is a detail.

Referring to the drawings by letter, A represents the armature shaftwhich carries a spider a of any suitable construction, which, in turn,supports an iron ring B. This ring is made up of a series of disks orlaminations, each having an opening in the center of the same diameteras the others, which is indicated by the line b, and each alternate diskhaving an exterior diameter somewhat less than those lying between them,so that a series of annular grooves or dovetailed formations will occuron the exterior surface of the ring or cylinder when the disks areassembled together. The disks are held together partially by a spider,the ends of which embrace the two end disks, as shown in Fig. 2. Thislaminations are made in two lengths, shorter ones alternating with thelonger ones when they are assembled. The end plates of these cores arecast or forged in a shape indicated in Fig. 2; that is, the off-setportions in the direction of the shaft together with the offset portionsor heads of the intermediate plates, form a continuous flange around theouter end of the core for retaining the coil in place. The coil C isformed upon a spool independent of the core, and before the core isapplied to the ring the coil is slipped over it into the positionindicated in Figs. l and 2. The core is then applied to the ring bypassing the inward projecting plates of the core into the grooves in thesurface of the ring or cylinder, thus dovetailing the core to thecylinder and establishing a large surface of contact between the twoparts.

Itshould have been stated before that the innerend of the plates of thecores are formed on curves corresponding to the perimeter of the platesof which the cylinder is built up. The core is forced downward untilthese curved surfaces make an accurate contact with each other; then abolt CZ of non-magnetic material is passedlongitudinally through thering and the core to hold the parts rigidly together; the bolt issecured by a nutd. The perforations for these bolts may, of course, beformed at the same time that the plates are stamped out. in order toremove one of the coils, it is only necessary to remove the single boltwhich retains it upon the cylinder; the coilmay then be repaired andreturned to its position on the armature. For some purposes a lami- Itwill thus be seen that Dated core for the coils may not be necessary anda solid core may be secured to the ring by passing it down between theend plates thereof; all of the intermediate plates of the 5 ring Willthen be of the shorter diameter.

Having thus described my invention, I claiml. An armature for dynamoelectric machines and motors, consisting of a laminated 1o ring orcylinder having annular grooves in its periphery, in combination with aseries of removable radial cores each carrying a coil, said cores beingbuilt up of plates which alternately projectinto the grooves of the cylx5 inder, substantially as described.

2. An armature for dynamo electric ma- TALTER T. KOSlNSK.

Witnesses:

FRANK S. OBER, W. A. OPPERMAN.

